<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>活塞模型查看系统</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            width: 100%;
            height: 100vh;
            overflow: hidden;
            background: linear-gradient(135deg, #0a1929 0%, #1a237e 50%, #283593 100%);
            background-attachment: fixed;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(33, 150, 243, 0.1) 1px, transparent 1px),
                linear-gradient(90deg, rgba(33, 150, 243, 0.1) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            animation: gridMove 20s linear infinite;
        }

        @keyframes gridMove {
            0% { transform: translate(0, 0); }
            100% { transform: translate(50px, 50px); }
        }

        body::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(33, 150, 243, 0.15) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
            pointer-events: none;
        }

        @keyframes rotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .container {
            width: 90%;
            max-width: 1400px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        h1 {
            color: #ffffff;
            font-size: 56px;
            margin-bottom: 20px;
            font-weight: 700;
            text-shadow: 
                0 0 10px rgba(33, 150, 243, 0.8),
                0 0 20px rgba(33, 150, 243, 0.6),
                0 0 30px rgba(33, 150, 243, 0.4),
                2px 2px 4px rgba(0, 0, 0, 0.5);
            letter-spacing: 2px;
            position: relative;
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from {
                text-shadow: 
                    0 0 10px rgba(33, 150, 243, 0.8),
                    0 0 20px rgba(33, 150, 243, 0.6),
                    0 0 30px rgba(33, 150, 243, 0.4),
                    2px 2px 4px rgba(0, 0, 0, 0.5);
            }
            to {
                text-shadow: 
                    0 0 15px rgba(33, 150, 243, 1),
                    0 0 25px rgba(33, 150, 243, 0.8),
                    0 0 35px rgba(33, 150, 243, 0.6),
                    2px 2px 4px rgba(0, 0, 0, 0.5);
            }
        }

        .subtitle {
            color: rgba(144, 202, 249, 0.9);
            font-size: 22px;
            margin-bottom: 80px;
            letter-spacing: 3px;
            text-transform: uppercase;
            font-weight: 300;
            text-shadow: 0 0 10px rgba(144, 202, 249, 0.5);
        }

        .tabs-container {
            display: flex;
            gap: 40px;
            justify-content: center;
            flex-wrap: wrap;
            perspective: 1000px;
        }

        .tab {
            flex: 1;
            min-width: 320px;
            max-width: 400px;
            position: relative;
            background: linear-gradient(135deg, rgba(25, 118, 210, 0.15) 0%, rgba(13, 71, 161, 0.25) 100%);
            border: 2px solid transparent;
            border-radius: 24px;
            padding: 50px 35px;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            backdrop-filter: blur(20px);
            box-shadow: 
                0 8px 32px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(33, 150, 243, 0.3) inset,
                0 0 40px rgba(33, 150, 243, 0.1);
            overflow: hidden;
            transform-style: preserve-3d;
        }

        .tab::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(33, 150, 243, 0.3), transparent);
            transform: rotate(45deg);
            transition: all 0.6s;
            opacity: 0;
        }

        .tab::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 24px;
            padding: 2px;
            background: linear-gradient(135deg, 
                rgba(33, 150, 243, 0.8) 0%,
                rgba(144, 202, 249, 0.6) 50%,
                rgba(33, 150, 243, 0.8) 100%);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            opacity: 0;
            transition: opacity 0.4s;
        }

        .tab:hover {
            background: linear-gradient(135deg, rgba(25, 118, 210, 0.25) 0%, rgba(13, 71, 161, 0.35) 100%);
            transform: translateY(-15px) rotateX(5deg) scale(1.05);
            box-shadow: 
                0 20px 60px rgba(33, 150, 243, 0.4),
                0 0 0 1px rgba(33, 150, 243, 0.6) inset,
                0 0 80px rgba(33, 150, 243, 0.3),
                0 0 120px rgba(33, 150, 243, 0.2);
        }

        .tab:hover::before {
            opacity: 1;
            animation: shine 1.5s ease-in-out;
        }

        .tab:hover::after {
            opacity: 1;
        }

        @keyframes shine {
            0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
            100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
        }

        .tab:active {
            transform: translateY(-10px) rotateX(2deg) scale(1.02);
        }

        .tab-content {
            position: relative;
            z-index: 2;
        }

        .tab-icon {
            font-size: 80px;
            margin-bottom: 25px;
            display: block;
            filter: drop-shadow(0 0 20px rgba(33, 150, 243, 0.8));
            transition: all 0.4s;
            animation: float 3s ease-in-out infinite;
        }

        .tab:hover .tab-icon {
            transform: scale(1.2) rotateY(15deg);
            filter: drop-shadow(0 0 30px rgba(33, 150, 243, 1));
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .tab-title {
            color: #ffffff;
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 
                0 0 10px rgba(33, 150, 243, 0.8),
                0 0 20px rgba(33, 150, 243, 0.5);
            letter-spacing: 1px;
            transition: all 0.4s;
        }

        .tab:hover .tab-title {
            text-shadow: 
                0 0 15px rgba(33, 150, 243, 1),
                0 0 25px rgba(33, 150, 243, 0.8),
                0 0 35px rgba(33, 150, 243, 0.6);
            transform: scale(1.05);
        }

        .tab-description {
            color: rgba(187, 222, 251, 0.9);
            font-size: 18px;
            line-height: 1.8;
            text-shadow: 0 0 5px rgba(144, 202, 249, 0.3);
            transition: all 0.4s;
        }

        .tab:hover .tab-description {
            color: rgba(187, 222, 251, 1);
            text-shadow: 0 0 10px rgba(144, 202, 249, 0.6);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            h1 {
                font-size: 36px;
            }

            .subtitle {
                font-size: 14px;
                margin-bottom: 50px;
                letter-spacing: 2px;
            }

            .tabs-container {
                flex-direction: column;
                align-items: center;
                gap: 30px;
            }

            .tab {
                width: 100%;
                max-width: 100%;
                min-width: 280px;
                padding: 40px 30px;
            }

            .tab-icon {
                font-size: 64px;
            }

            .tab-title {
                font-size: 28px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>活塞模型查看系统</h1>
        <div class="subtitle">Piston Model Viewer System</div>
        
        <div class="tabs-container">
            <div class="tab" onclick="window.location.href='index.html'">
                <div class="tab-content">
                    <div class="tab-title">国宾车活塞</div>
                    <div class="tab-description">国宾车专用活塞模型，展示各部位详细结构</div>
                </div>
            </div>
            
            <div class="tab" onclick="window.location.href='motuoche.html'">
                <div class="tab-content">
                    <div class="tab-title">摩托车活塞</div>
                    <div class="tab-description">摩托车发动机活塞模型，高性能设计</div>
                </div>
            </div>
            
            <div class="tab" onclick="window.location.href='wurenji.html'">
                <div class="tab-content">
                    <div class="tab-title">无人机活塞</div>
                    <div class="tab-description">无人机发动机活塞模型，轻量化精密结构</div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>

